v0.4. Daemon modules, LED control

internet-detector/files/usr/lib/internet-detector/mod_led_control.lua

@@ -0,0 +1,81 @@
+
+local nixio  = require("nixio")
+
+local Module = {
+	name                  = "mod_led_control",
+	sysLedsDir            = "/sys/class/leds",
+	syslog                = function(level, msg) return true end,
+	writeValue            = function(filePath, str) return false end,
+	readValue             = function(filePath) return nil end,
+	ledName               = nil,
+	_enabled              = false,
+	_ledDir               = nil,
+	_ledMaxBrightnessFile = nil,
+	_ledBrightnessFile    = nil,
+	_ledMaxBrightness     = nil,
+}
+
+function Module:resetLeds()
+	local dir = nixio.fs.dir(self.sysLedsDir)
+	if not dir then
+		return
+	end
+	for led in dir do
+		local brightness = string.format("%s/%s/brightness", self.sysLedsDir, led)
+		if nixio.fs.access(brightness, "w") then
+			self.writeValue(brightness, 0)
+		end
+	end
+end
+
+function Module:init(t)
+	self.ledName = t.led_name
+	if not self.ledName then
+		return
+	end
+	self._ledDir = string.format("%s/%s", self.sysLedsDir, self.ledName)
+	self._ledMaxBrightnessFile = self._ledDir .. "/max_brightness"
+	self._ledBrightnessFile    = self._ledDir .. "/brightness"
+	self._ledMaxBrightness     = self.readValue(self._ledMaxBrightnessFile) or 1
+	if (not nixio.fs.access(self._ledDir, "r") or
+	    not nixio.fs.access(self._ledBrightnessFile, "r", "w")) then
+		self._enabled = false
+		self.syslog("warning", string.format('%s: "%s" is not available', self.name, self.ledName))
+	else
+		self._enabled = true
+		-- Reset all LEDs
+		--self:resetLeds()
+	end
+end
+
+function Module:getCurrentState()
+	local state = self.readValue(self._ledBrightnessFile)
+	if state and tonumber(state) > 0 then
+		return tonumber(state)
+	end
+end
+
+function Module:on()
+	self.writeValue(self._ledBrightnessFile, self._ledMaxBrightness)
+end
+
+function Module:off()
+	self.writeValue(self._ledBrightnessFile, 0)
+end
+
+function Module:run(currentStatus, lastStatus)
+	if not self._enabled then
+		return
+	end
+	if currentStatus == 0 then
+		if not self:getCurrentState() then
+			self:on()
+		end
+	else
+		if self:getCurrentState() then
+			self:off()
+		end
+	end
+end
+
+return Module